日期：
来源：雅诚德英语网
And they carry out various biochemical processes in your intestine and they help you digest food.
而他们在你的肠子里执行多种生化过程，帮助你消化食物。
And they carry out various biochemical processes in your intestine and they help you digest food.
而他们在你的肠子里执行多种生化过程，帮助你消化食物。